Biliary tree model



FIG. 1 is a front perspective view of a biliary tree model, showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is an elevational view thereof from the left side of FIG. 1; and

FIG. 6 is an elevational view thereof from the right side of FIG. 1. 

The ornamental design for a biliary tree model, substantially as shown and described. 